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.
Y
：
Control damper to open or close
DA/DA2
：
DA: Control 2-wire valve; DA2: Control 3-wire valve,
When the temperature reaches the set-point, it will
close the valve with the fan still running.
DB/DB2: DB:Control 2-wire valve; DB2: Control 3-wire
valve ,When the temperature reaches the set-point,
it will close both the valve and fan.
FCV2
：
Control 4 pipe fan coil units, Control heating and
cooling valves and 3-speed fan, when the
temperature reaches the set-point, it will close the
valves with the fan still running
HL2023
-
HL2023 Series Thermostat User Manual
HL2023 Series Touch Pad fan coil unit thermostats are designed to control the room
temperature in air-conditioning fan coil unit system or dust pipe channel system. HL2023
series thermostats with microprocessor and big LCD display. It shows the following items:
working status (cool, heat or ventilation), fan speed, room temperature, set-point
temperature etc. Keys include on/off
（
）
.mode( ),fan speed (
) and temperature
adjustment (
).
MODEL DESCRIPTION
L
：
white backlight. Blank is invalid.
E
：
auto-restart (Restart the working status of
last 6 seconds before power off). Blank is
invalid.
BASIC FEATURES
LCD Display
Room temperature setting
Manual or auto 3-speed changeover
Defrost (low temperature protection)
White backlight ( -L, Optional )
Key lock ( Optional )
Auto-restart ( Optional )
Working Status: Cooling
,
or Ventilation
Fan
、
Med
、
High
or
AUTO
）
FCU valve status
Room temperature display
Temperature setting display
SPECIFICATIONS
Sensing element:
NTC
Accuracy:
1
℃
Set-point range:
5
℃
to 35
℃
Display range:
0
～
55
℃
Operation environment: 0
～
45
℃
Operating Humidity:
5
～
90%RH
(non-condensing)
Key: soft touch
Power supply:
AC 85
～
260V, 50/60Hz
Wirings: Accepting 2 × 1.5 mm
2
or 1 x 2.5mm
2
wires
Switch current rating: Resistive: 2 A, Inductive: 1 A
Housing: PC + ABS Fire Retardant
Dimensions: 86.6
×
86.6
×
15.5 mm ( W × H × D )
Hole pitch: 60 mm ( Standard )
Protection Class: IP30
Rated Power:
1W
